package com.biz.hunter.wechat.interceptor;

import java.io.UnsupportedEncodingException;
import java.lang.reflect.Method;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.ui.ModelMap;
import org.springframework.util.StringUtils;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.biz.hunter.db.entity.jsConfig;
import com.biz.hunter.service.impl.SysConfigService;
import com.biz.system.config.WebchatServiceConstant;
import com.biz.wechat.annotation.OAuthRequired;
import com.biz.wechat.util.SignUtil;

public class WxconfigInterceptor implements HandlerInterceptor {
	
	private static Logger logger = LoggerFactory.getLogger(WxconfigInterceptor.class);

	/**
	 * * 在DispatcherServlet完全处理完请求后被调用 *
	 * 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion()
	 */
	@Override
	public void afterCompletion(HttpServletRequest request,
			HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
		logger.debug("**执行顺序: 3、afterCompletion**");
	}

	/** * 在业务处理器处理请求执行完成后,生成视图之前执行的动作 */
	@Override
	public void postHandle(HttpServletRequest request,
			HttpServletResponse response, Object arg2, ModelAndView modelAndView)
			throws Exception {
		logger.debug("**执行顺序: 2、postHandle**");
		/* config */
    String ticket =      SysConfigService.getJsTicket();
    logger.debug("js api ticket is " + ticket);
    String url = request.getRequestURL().toString();
    if (!StringUtils.isEmpty(request.getQueryString())) {
      url = url + "?" + request.getQueryString();
    }
    logger.debug("request url is " + url);

    Map<String, String> jsconfig = SignUtil.getJSSignature(ticket, url);

    jsConfig config = new jsConfig();
    config.setAppid(WebchatServiceConstant.APPID);
    config.setCurrenttimestamp(jsconfig.get("timestamp"));
    config.setNonceStr(jsconfig.get("nonceStr"));
    config.setSignatureStr(jsconfig.get("signature"));
    if (modelAndView==null)
    {
      modelAndView = new ModelAndView();
    }
    modelAndView.addObject("config", config);
	}

	/**
	 * * 在业务处理器处理请求之前被调用 如果返回false 从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链
	 * 如果返回true 执行下一个拦截器,直到所有的拦截器都执行完毕 再执行被拦截的Controller 然后进入拦截器链,
	 * 从最后一个拦截器往回执行所有的postHandle() 接着再从最后一个拦截器往回执行所有的afterCompletion()
	 */
	@Override
	public boolean preHandle(HttpServletRequest request,
			HttpServletResponse response, Object handler) throws Exception {
	  
		return true;
	}
	

}